Braille Dots

A standard braille cell consists of six dots arranged in three rows and two columns. Each dot can be specifically identified by its number as follows:

Dot Position Row Column
1 top-left 1 1
2 middle-left 2 1
3 bottom-left 3 1
4 top-right 1 2
5 middle-right 2 2
6 bottom-right 3 2

Computer braille has introduced a fourth row at the bottom.

Dot Position Row Column
7 below-left 4 1
8 below-right 4 2

A picture may make this numbering convention easier to understand:

1 o o 4
2 o o 5
3 o o 6
7 o o 8